Measurement and Testing

  • Testing Pressure Safety Valves just got a lot easier

Testing Pressure Safety Valves just got a lot easier

Nov 20 2019 Read 266 Times

In the past it was difficult to test Pressure Safety Valves (PSVs) because a digital gauge, a steam or gas source and a clipboard were needed. After the test was done all the data was recorded, passing valves were measured and all data was recorded by hand. This information was then transcribed into a computer for use in generating a certificate. Not any more.

Now with the Ralston Instruments PSV Test suite of software and hardware it is possible to conduct the test and record most of the information on the calibrator. After the test is completed the data is then transfered electronically to a PC where a certificate with graphs, customer data, tag data and other required information can be created.

The unique PSV test mode captures the PSV crack and reseat pressure by logging pressure at 128 times per second. Most competitors' devices do not reliably capture the crack and reseat because the logging rate is too slow. The PSV mode also allows the user to select from standards such as ASME Boiler Code Section 8, simple crack tests or conditional crack tests where the allowable error may depend on the pressure of the PSV. the user can enter the pressure of the valve at the time of test and type in any other important information right on the FieldLab. Thus when the user returns to the office they can download all important information and create the certificates without a lot of extra effort.

The PSV test mode works with steam and gas valves as well as liquid valves where the user needs to witness the first steady stream of liquid prior to recording the crack pressure. It also has the option of running a leak test and logging the change in pressure and whether any leakage was observed. This provides a great deal of flexibility and allows for a smoother and more reliable workflow in conducting PSV tests. The FieldLab is available from 200 kPa to 70 MPa so it covers the ranges of most PSVs in the field. It is also rated IECEx rated Ex ia IIC T4 Ga (-10 < Ta < 50 °C)so that it can be used in most hazardous locations without a problem.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment




Digital Edition

Petro Industry News November 2019

November 2019

In This Edition Fuel for Thought - Leading European sensor trade event taking place in 2020 already selling out fast - Endress+Hauser and Vector CAG secure contract at large Texas refinery...

View all digital editions

Events

SLAS 2020

Jan 25 2020 San Diego, CA, USA

European Gas Conference

Jan 28 2020 Vienna, Austria

EGYPS (Egypt Petroleum Show)

Feb 11 2020 Cairo, Egypt

Smart Factory Expo (SFE 2020)

Feb 12 2020 Tokyo, Japan

ME-TECH 2020

Feb 18 2020 Abu Dhabi, UAE

View all events